Jazz lite

Three notes can carry a seventh chord: the root, the 3rd (major or minor), and the 7th (major or flat). That is a shell voicing — enough harmony to walk a ii–V–I without a six-string grip. v2 opens jazz; the dictionary still holds method-book sevenths, not a full extension chart.

Pair with Play along (progressions, titles only) · Chord dictionary · Scales ·.

Play becomes Stop on the same button. Tempo follows the metronome. TAB is A string on top — Foundations · TAB.

Sources (two-check): Berklee ukulele-lab shells (root + guide tones 3 and 7 on compact GCEA grips) · Hal Leonard Jazz Ukulele Method (ii–V–I as the first jazz cadence; swing eighths as a triplet with the first two tied). No copied heads or riffs.

Shell voicings

Low to high, two useful orders: R–3–7 (3rd then 7th) and R–7–3 (7th then 3rd). Same three pitch classes; the 3 and 7 swap which string they sit on. Mute the unused strings.

String sets: A set = root on the A string (C shells below). G set = root on the G string (G shells below). Mute unused strings. R–7–3 often skips C so the guide tones stay inside a tight box. Slide the whole grip; the letter follows the root.

A-string set — C shells

Root C on the A string, fret 3. R–3–7 puts the 3rd on E (or C for the minor) and the 7th on G. R–7–3 skips E and puts 7 and 3 on G and C.

R–3–7

A|-3---3---3-------   C
E|-0-------0-------   E / · / E
C|-----3-----------   · / Eb / ·
G|-4---3---3-------   B / Bb / Bb

Cmaj7 = C E B · Cm7 = C E♭ B♭ · C7 = C E B♭. Only the 3rd and 7th move. That is the whole colour change.

R–7–3

A|-3---3---3-------   C
E|-----------------   skip
C|-4---3---4-------   E / Eb / E
G|-4---3---3-------   B / Bb / Bb

Same letters, 7th below the 3rd on the inner strings. Use this when the next chord’s guide tones want to move by a fret or two on G and C.

G-string set — G shells

Root G on the open G string — the friendliest uke home for these shells. Both orders use the same compact grip (root on G; guide tones on E and A). R–3–7 walks 3 then 7; R–7–3 walks 7 then 3. Slide the grip; C is the same shapes five frets higher (root on C fret 5).

R–3–7

A|-2---1---2-------   B / Bb / B
E|-2---1---1-------   F# / F / F
C|-----------------   skip
G|-0---0---0-------   G

R–7–3

A|-2---1---2-------   B / Bb / B
E|-2---1---1-------   F# / F / F
C|-----------------   skip
G|-0---0---0-------   G

Same frets as R–3–7; the walk names 7 then 3.

ii–V–I

The jazz cadence: minor 7 on scale degree 2, dominant 7 on 5, major 7 on 1. In C that is Dm7–G7–Cmaj7. In G, Am7–D7–Gmaj7. One bar each on ii and V, two bars on I — a four-bar loop.

The room dictionary has open G7, Am7, and D7. It does not have Dm7, Cmaj7, or Gmaj7. Where a seventh shape exists, the loop strums it. Where it is missing, you hear a shell (root + 3rd + 7th as fretted notes) — not a fake dictionary entry.

Key	ii	V	I	How the model sounds
C	Dm7 (shell)	G7 (strum)	Cmaj7 (shell)	A-set shells + dictionary G7
G	Am7 (strum)	D7 (strum)	Gmaj7 (G-set shell)	Am7 + D7 strums; I is the Gmaj7 shell

Famous-title harmony (no melody): many standards sit on this cadence. Map a loop on Play along if you want campfire letters in the same keys. Scale work for Mixolydian / Dorian colour: Scales and Modes.

Swing feel & muted comping

Straight eighths split the beat in half. Swing eighths split it as a triplet: the first two parts tied, then the last part. Count 1-trip-let 2-trip-let; play on 1 and let. At slow tempos the long–short gap is obvious; as you go faster it tightens. The metronome still clicks quarters — you place the second note late, not the click.

Comping (accompanying) often leaves beat 1 open and chucks on 2 and 4 — muted eighths, not a full ring. That is a seed, not a transcribed chart.

A|-----------------
E|-x---x---x---x---   muted swing eighths
C|-----------------
G|-----------------   1     2     3     4

Hold a C7 or G7 shell in the left hand while the right hand mutes. Compare straight muted eighths on Exercises · palm mute.

Dominant 7 → altered colour

A plain dominant is R–3–5–b7. Jazz players often add colour tones a half step above the root: the flat 9 (b9) and the sharp 9 (#9). On G7 that is A♭ and A♯/B♭ — two fretted notes, not a new dictionary chord. Play them as extras after the shell, then resolve to C. Generic colour, not a quoted lick.

A|-2---------------   B (3)
E|-----------------
C|-----------------
G|-0---1---3-------   G (root) · Ab (b9) · Bb (#9)

The 3rd (B) still says “this is major-third dominant.” The extra notes are paint. Resolve the colour into Cmaj7 (B and B♭ both want to move). Ear check:.

Three tracks

Beginner

Own Cmaj7 R–3–7. Play the arpeggio walk slow. Listen to G7 from the dictionary. Do not rush the ii–V–I loop.

Intermediate

Add R–7–3 and the G-set shells. Loop ii–V–I in C with the metronome near 60. Chuck on 2 and 4.

Advanced

Both keys. Swing eighths even. Add b9/#9 on G7, then land on Cmaj7. Name 3 and 7 out loud while you play.

Play along Dictionary Scales Ear